/*
* Copyright (C) 2011 Leo Yang <leoyang@webkit.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include"config.h"
#ifENABLE(SVG) && ENABLE(SVG_FONTS)
#include"SVGAltGlyphItemElement.h"
#include"SVGGlyphRefElement.h"
#include"SVGNames.h"
namespace WebCore {
inlineSVGAltGlyphItemElement::SVGAltGlyphItemElement(const QualifiedName& tagName, Document* document)
: SVGElement(tagName, document)
{
ASSERT(hasTagName(SVGNames::altGlyphItemTag));
}
PassRefPtr<SVGAltGlyphItemElement> SVGAltGlyphItemElement::create(const QualifiedName& tagName, Document* document)
{
return adoptRef(new SVGAltGlyphItemElement(tagName, document));
}
boolSVGAltGlyphItemElement::hasValidGlyphElements(Vector<String>& glyphNames) const
{
// Spec: http://www.w3.org/TR/SVG/text.html#AltGlyphItemElement// The ‘altGlyphItem’ element defines a candidate set of possible glyph substitutions.
// The first ‘altGlyphItem’ element whose referenced glyphs are all available is chosen.
// Its glyphs are rendered instead of the character(s) that are inside of the referencing
// ‘altGlyph’ element.
//
// Here we fill glyphNames and return true only if all referenced glyphs are valid and
// there is at least one glyph.
for (Node* child = firstChild(); child; child = child->nextSibling()) {
if (child->hasTagName(SVGNames::glyphRefTag)) {
String referredGlyphName;
if (static_cast<SVGGlyphRefElement*>(child)->hasValidGlyphElement(referredGlyphName))
glyphNames.append(referredGlyphName);
else {
glyphNames.clear();
return false;
}
}
}
return !glyphNames.isEmpty();
}
}
#endif